दो या दो से अधिक संख्याओं को गुणा करने के बाद प्राप्त परिणाम को गणितीय रूप से क्या कहा जाता है?

There are five spools of thread in white, black, red, green, and blue colors. Each spool measures 87.50 m. If thread used is: white = 43.25 m, red = 38.62 m, black = 71.98 m, green = 21.04 m, and blue = 29.74 m, find the balance thread remaining in all five spools together.

A government office uses 4 reams of paper daily. How many reams in total will they use in 7 days?